I was looking around on the Old Car Brochures website and came across a salesman specification guide for 1964 Oldsmobiles. It lists the retail price for each model, along with the pricing for all the various options. Yes, it's for Oldsmobiles but I figure the option costs were probably comparable to what Pontiac charged for similar options. It may be a useful reference if you're wondering what it cost to include tinted glass, power steering, am/fm radio, etc. on your car.
https://oldcarbrochures.org/United%2...ecs/index.html